Journal of Food, Agriculture and Environment

Effect of GA₃ on dormancy breaking of ‘Marfona’ potato mini-tubers under greenhouse conditions

Author(s):

Fariborz Shekari ^1*, Mohammad Bagher Khorshidi Benam ², Sardar Germchi ³, Davoud Hassanpanah ⁴

Recieved Date: 2010-08-14, Accepted Date: 2010-11-04

Abstract:

A greenhouse experiment was conducted to evaluate GA₃ application on ‘Marfona’ potato mini-tubers dormancy breaking during 2008. Five different concentrations (0, 40, 80, 120 and 160 ppm) of GA₃ were applied on mini-tubers as completely randomized design with three replications. Sprout number, length of the highest sprout and day needed for sprout emergence were evaluated beyond mini-tubers dormancy alleviation. After tubers planting, some traits were recorded as days needed to emergence and main stems number and height. Tuber number per plant, tubers total weight and mean weight of tubers per plant were measured after harvest. The results showed that GA₃ application had significant effects on all traits except sprout and main stem number. GA₃ application of 160 ppm reduced the days needed to sprout emergence from 100 to 70 days and increased tuber number per plant from 4 to 7.5 compared to control. Furthermore, 160 ppm GA₃ significantly influenced tuber total yield per plant from 150 to 200 g compared with un-treated mini-tubers. In total, it seems that in order to planting the mini-tubers, application of 160 ppm GA₃ hastens dormancy breaking and improves emergence and hence leads to more tuber number per plant and ultimately increased yield of ‘Marfona’ potato mini-tubers.

Keywords:

GA₃, ‘Marfona’ potato, sprout number, emergence, dormancy, yield

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Journal: Journal of Food, Agriculture and Environment
Year: 2010
Volume: 8
Issue: 3&4
Category: Agriculture
Pages: 422-425

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